We are very happy to announce "Debian Edu Squeeze 6.0.4 rc3", as we believe this is very very close to what we will release as r0 soon! See below for 6.0.4 r0 and 6.0.4 r1 release schedules!

Debian Edu aka Skolelinux is a Linux distribution based on Debian providing an out-of-the box environment of a completely configured school network. It contains setup for a school server, PXE booting for diskless machines, setup for installing stationary workstations and setup for workstations that can be taken away from the school network.

Several educational applications like celestia, drgeo, gcompris, geogebra, kalzium, kgeography solfege and kgeography are included in the default desktop setup.

Those who already are using rc1 or rc2 can upgrade to this version using for example apt-get upgrade. Users upgrading from beta3 must make sure to keep the existing gosa.conf file for everything to keep working as expected when dpkg ask how to handle the changed file during upgrade.

The following features are not working as they should

The RDP server set up on thin-client-servers gives distorted KDE desktop at least when logging in using rdesktop (BTS 608195). This is a bug in the vnc4server package, and a workaround is to use the tigervnc server (missing in Debian/Squeeze) instead.

We are very happy to announce "Debian Edu Squeeze 6.0.4 rc2", as we believe this is very close to what we will release as r0 soon! See below for rc3 and 6.0.4 r0 release schedules!

Debian Edu aka Skolelinux is a Linux distribution based on Debian providing an out-of-the box environment of a completely configured school network. It contains setup for a school server, PXE booting for diskless machines, setup for installing stationary workstations and setup for workstations that can be taken away from the school network.

Several educational applications like celestia, drgeo, gcompris, geogebra, kalzium, kgeography solfege and kgeography are included in the default desktop setup.

Those who already are using rc1 can upgrade to this version using apt-get upgrade. Users upgrading from beta3 must make sure to keep the existing gosa.conf file for everything to keep working as expected when dpkg ask how to handle the changed file during upgrade.

We might decide to aim for March 31st for edu r1, if you don't take this serious ;-p

Changes compared to rc1 version

tasks/lang-fr (in rc2 only works for CD installs, will be fixed for DVD instals in rc3.)

freerdp-x11 is installed by default as RDP and VNC client. (Previously rdesktop was installed instead.)

Make backup system more robust in handling LDAP database dump and restart.

Improve handing of removable media on thin clients. Show desktop notification longer when inserting new media and provide an option to start dolphin when such media is inserted.

Make sure the Main Server + Roaming Workstation profile selection give an

error, as this is an invalid combination.

The Debian Edu Squeeze Manual has gained a Danish translation, which is currently in preparation.

The following features are not working as they should

The RDP server set up on thin-client-servers gives distorted KDE desktop at least when logging in using rdesktop (#608195). This is a bug in the vnc4server package, and a workaround is to use the tigervnc server instead..

Debian Edu aka Skolelinux is a Linux distribution based on Debian providing an out-of-the box environment of a completely configured school network. It contains setup for a school server, PXE booting for diskless machines, setup for installing stationary workstations and setup for workstations that can be taken away from the school network.

Several educational applications like celestia, drgeo, gcompris, geogebra, kalzium, kgeography solfege and kgeography are included in the default desktop setup.

Those who already is using beta3 can upgrade to this version using apt-get upgrade, but must make sure to keep the existing gosa.conf file for everything to keep working as expected when dpkg ask how to handle the changed file during upgrade.

Debian Edu aka Skolelinux is a Linux distribution based on Debian providing an out-of-the box environment of a completely configured school network. It contains setup for a school server, PXE booting for diskless machines, setup for installing stationary workstations and setup for workstations that can be taken away from the school network.

Those who already tested beta2 will need to install their machines again to get all the fixes and improvement now provided with beta3.

Testing and giving feedback to debian-edu@lists.debian.org or #debian-edu on irc.debian.org is a very good way to start contributing! Act now :-D

If you can do more, give the manual linked to above some love. It needs it.

Changes compared to beta2 version

The default gateway is now 10.0.0.1/8, not 10.0.2.1/8.

A tool subnet-change is provided to change the default backbone network after installation.

The dynamic DHCP range was extended on the backbone network to around 4k IP address, and around 200 IP addresses for the thin client network.

Enable automatic extending of full file systems on the Main Server by default. This can be disabled in LDAP.

Add code to re-enable stopped CUPS queues every hour on the Main Server, and flush all CUPS queues every night. Both can be disabled in LDAP.

Add new script pxe-addfirmware to insert hardware firmware in PXE images to support more hardware models.

Provide script sitesummary2ldapdhcp to update or populate GOsa with system objects using information gathered by sitesummary, to make it easier to add new computers to the network.

Now we disable (at least some of the) non-working features in GOsa to avoid confusing system administrators.

Drop the 'localadmin' user, and ask during installation of the Main-Server for user name and password for the first user (the admin user). This user is set up as GOsa administrator, and the 'super-admin' user is no longer created, either. Also the Debian Edu menu reordering is enabled for this initial user.

Provide network blocking / exam mode by default, controlled by LDAP. This block selected hosts from accessing the Internet. In addition to network blocking, changes to the Squid proxy configuration is needed for this to be useful.

Now we provide a KDE menu entry for changing the password in GOsa.

Changing passwords using PAM is now working (by having implemented a workaround for bug #656309 in libpam-krb5). This will only update the Kerberos password, and not the Samba and GOsa(LDAP) password.

Make sure to report an error and abort the installation when trying to use the netinst images without a working Internet connection, instead of silently installing a broken system.

Change partitioning for Standalone installs, to have separate /home/ and no /usr.

The following features are not working as they should

The RDP server set up on thin-client-servers gives distorted KDE desktop at least when logging in using rdesktop (#608195). This is a bug in the VNC server.

GOsa does not clean up properly when removing a system (server/net-device) from LDAP (#650258). A patch for Debian squeeze has been sent to the Debian release team.

GOsa proposes non-functional user names for people with non-ASCII characters in their names (#657086). This issue only occurs in gosa-2.6.11 (squeeze) and a patch for Debian squeeze has been sent to the Debian release team.

Debian Edu aka Skolelinux is a Linux distribution based on Debian providing an out-of-the box environment of a completely configured school-network. It contain setup for a school server, PXE booting for diskless machines, setup for installing stationary workstations and setup for workstations that can be taken away from the school network.

Those who already tested beta1 will need to install their machines again to get all the fixes and improvement now provided with beta2.

From February 2012, Debian Lenny will not receive security updates anymore. So by then, Debian Edu Squeeze _should_ be available as an upgrade option as well as for new installations! In other words: we have work to do. Now!

But please bear in mind, that there will be _nobody_ fixing bugs, writing documentation, doing translations or doing any other work - unless *you* do it!

Testing and giving feedback to debian-edu@lists.debian.org or #debian-edu on irc.debian.org is a very good way to start contributing! Act now :-D

If you can do more, give the manual some love. It needs it.

Changes compared to alpha0, alpha1 and lenny version

Everything that's new in Squeeze compared to Lenny (link to Debian release notes)

Second test release, 6.0.0 edu alpha1, 2010-10-24

This is the second test release based on Squeeze. The focus of this release is the thin clients and the diskless workstation setup. Please install a thin client server, and make sure all programs in the KDE menu work on both thin clients and diskless workstations. Especially sound is important to test.

It is also useful to check that the language specific set of packages installed for your language are sufficient and correct.

The Gnome and LXDE desktop options (enabled by specifying desktop=gnome or desktop=lxde on the isolinux boot prompt) need more testing. Please let us know if the set of installed packages make sense for these environments.

Changes compared to alpha0 and lenny version

Everything from Debian Squeeze

New version of debian-installer

Added code in the installer to select suggested profile combinations by default based on the detected environment.

PXE boot setup now work when installing from the DVD.

New tool notify-local-users to send desktop notification to all logged in users on a machine. Useful for thin client servers.

First test release, 6.0.0 edu alpha0, 2010-07-27

This is the first test release based on Squeeze. The focus of this release is to test the user application selection. To have a look, install the standalone profile and let the developers know if the set of installed packages i.e. applications should be modified. If some user application is missing, or if there are some applications that no longer make sense to be included in Debian Edu, please let us know. Also, if a useful application is missing the translation for your language of choice, please let us know too.

In addition, feedback and help to polish the desktop (menus, artwork, starters, etc.) is appreciated. We would like to ship a nice and handy KDE4 desktop targeted for schools out of the box.

The other profiles should be installable, but there is a lot more work left to be done before they are ready, so do not expect to much.

Changes compared to the lenny based version

Everything from Debian Squeeze

Desktop environment KDE 4.4 => the new KDE desktop in combination with some new artwork

Web browser Iceweasel 3.5

OpenOffice.org 3.2

Educational toolbox GCompris 9.3

Music creator Rosegarden 10.04.2

Image editor Gimp 2.6.10

Virtual universe Celestia 1.6.0

Virtual stargazer Stellarium 0.10.4

3D modeler Blender 2.49.2 (new application)

Video editor Kdenlive 0.7.7 (new application)

Now using Kerberos for password checking (migration not finished). Enabled for:

PAM

LDAP

IMAP

SMTP (sender verification)

New experimental roaming workstation profile for laptops.

Show welcome page to users when they first log in. The URL is fetched from LDAP.

New LXDE desktop option, in addition to KDE (default) and Gnome.

General cleanup (not finished)

The following features are not working as they should

No web based administration tool for creating users and groups. The scripts ldap-createuser-krb and ldap-add-user-to-group can be used for testing.

DVD installs are missing debian-installer images for the PXE boot, and do not set up the PXE menu on eth0 because of this. LTSP clients should still boot from eth1 on thin client servers.

The restructured KDE menu is not implemented.

The LDAP server setup need to be reviewed for security.

The LDAP directory structure need to be reworked.

Different sets of packages are installed when using the DVD and the netinst CD. More packages are installed using the netinst CD.

The jackd package fail to install. This is believed to be caused by some ongoing transition, and hopefully should be solved soon. The jackd1 package can be installed manually for those that need it.

Debian-Edu/Skolelinux 5.0 (Lenny based)

First update release, 5.0.6 edu1, 2010-10-05

Changes compared to edu0

Fixed some ordering bugs in the boot sequence of a Main-server, making the boot more robust.

Make PXE installation of LTSP servers with the Squid HTTP proxy more robust, by disabling HTTP pipelining in APT.

Updated internal web page and its translations.

several bugfixes, including fixes for Skolelinux bugs #1436, #1427, #1441, #1413, #1450 and Debian bugs #585966, #585772, #585968, #586035 and #585966 plus several which were not filed.

Improved Norwegian Bokmål and added Danish debconf translation. Merge new web pages from Squeeze. The text is the same, but it provides new translation for zh, compete translations for all included langauges (de es fr it nb nl ru zh), and a rename of the .no page to .nb to reflect the langauge used. Add ??ForceType to apache config, to enforce .html.nb pages to text/html and not application/matematica.

Test release 4, alpha3 2010-01-12

This is the forth test release (alpha3) of the Lenny based Skolelinux version. Since the previous test release (alpha3) some bugs got fixed and some of the features broken in the last release are now working.

The updated images can be downloaded via FTP, HTTP and rsync (see below for detailed instructions). The CD image size is about 606 MiB and the DVD about 4.4 GiB.

Here are the most remarkable changes since the last test release (alpha2):

Rewrote sound handling for thin clients, to use ESD for KDE and Pulseaudio and ALSA via pulseaudio for everything else, to get more applications working with sound on thin clients. Selected applications (audacity, gtick) using /dev/dsp (OSS) have been configured to use Pulseaudio instead.

Adjusted PowerDNS configuration to avoid slow lookups when no Internet cconnection is available.

Correct PXE installation settings when installing the main-server using DVD, to make sure the preseeded mirror settings make sense.

Added some more post-installation tests.

Updated Gnash to a version writing less log messages to ~/.xsession-errors (#1404).

The bug that made dhcp3d die every night when it saw little trafic has been fixed (#1398).

Adjusted Iceweasel handling of the home-made SSL certificate. This still need more work.

Partition sizes have been adjusted for installation of Main-server+Thin-Client-Server, Main-Server+Workstation and Workstation to avoid having to extend them during installation.

Now install the bash-completion package in every profile, to make sure bash behave the same in Debian Edu and the normal Debian installation.

Now install acpi-support-base on LTSP clients to make sure the power button work on hardware where it send an ACPI event.

Fixed syslog setup for all clients, now syslog messages are forwarded to the main-server.

Corrected charset on the web server front page, and added the Italian web page to the package.

Updated Squid web proxy configuration to make sure all packages used by the PXE installation will be cached by Squid.

...

The following features are still not working as they should:

In some settings, the diskless workstations fail to connect to the LDAP server and fail to work (#1408).

Locking the display do not work on diskless workstations. This can be fixed by running "chmod 644 /opt/ltsp/i386/etc/ldap/ssl/ldap-server-pubkey.pem" as root on the LTSP server (#1415).

...

Test release 3, alpha2 2009-12-21

This is the third test release (alpha2) of the Lenny based Skolelinux version. Since the previous test release (alpha1) some bugs got fixed and some of the features broken in the last release are now working.

The updated images can be downloaded via FTP, HTTP and rsync (see below for detailed instructions). The CD image size is about 606 MiB and the DVD about 4.4 GiB.

Here are the most remarkable changes since the second test release (alpha1):

Diskless workstations should now work out of the box, and boot faster.

Thin clients should boot faster.

PXE installation work properly, and pass on some installation parameter (language, mirror, desktop) from the parameters used when installing main-server.

the DVD installation now works without problems.

The following features are still not working as they should:

Gnash produce lot of messages in the users ~/.xsession-error, filling up home directories when visiting web pages with Flash content.

Test release 2, alpha1 2009-12-03

This is the second test release (alpha1) of the Lenny based Skolelinux version. Since the first test release (alpha0) some bugs got fixed and some of the features broken in the last release are now working.

The updated images can be downloaded via FTP, HTTP and rsync (see below for detailed instructions). The CD image size is about 606 MiB and the DVD about 4.4 GiB.

Here are the most remarkable changes since the first test release (alpha0):

The package killer is no longer automatically installed, because of some remaining bugs.

KPDF, Quanta and Kturtle are now installed automatically if KDE is installed as desktop environment.

The proxy server is now used by Iceweasel, even if the users remove proxy configuration from his/her profile.

The old DNS range names like printer, static, dhcp and ltsp are now added to the LDAP tree on installation.

Nagios3 configuration was revised and now has a better default behavior.

Further examples for extended Samba configuration are distributed.

The test suite, used to automatically detect errors in the installed system, after installation, is now more robust.

The following features are still not working as they should:

DVD does not work properly:

on installation of the combined mainserver+ltsp-server+workstation the text-mode installer hangs at the end with a bluescreen - press CTRL-C to continue installation

Nagios is not configured automatically through the data collected by Sitesummary.

Some flash based websites are not displayed correctly:

Gnash is now the default flash player, the non free flash plugin can be installed from lenny-backports (see http://www.backports.org/ for more information).

Test release 1, 2009-10-15

This is a first test release (alpha0) of the Skolelinux version based on Debian Lenny. As this is merely a snapshot of the currently ongoing development efforts, there are still some features missing or not in the final state. There are also some bugs not yet fixed. This test release is for the brave users who want to have a look at the next Skolelinux release and want to make sure, that their favorite feature is bug free (or report bugs otherwise).

After months of hard work, a new Skolelinux multi architecture (amd64, i386 and powerpc) netinstall CD is ready. This is the first test CD preparing for a Debian/Lenny based release. It is available from FTP, HTTP and rsync. The CD image size is about 606 MiB.

There are a lot of changes since the last CD/DVD release based on Etch. Here are some highlights:

Support for newer hardware: Based on Linux Kernel version 2.6.26 and X.org version 7.3

More flexible configuration: The configuration of the local DNS zone and the DHCP configuration have been moved into LDAP

Changed the sitesummary web page to be available from everywhere, and not just localhost, as almost the same information is available from the munin summary page and admins were confused when only one of the web pages were available.

The powerpc port has not been tested as much as the other architectures, though it should work just fine and has been reported to work. Still, we consider the port an experimental release of Debian-Edu, which we might not be able to support as the other archs. Its available for download at

Test Releases using Debian/Etch

Test release candidate 5, 2007-07-18

This is the fifth release candidate of debian-edu etch. After the release of rc4 there have been some new reports about critical bugs which were unknown before. Thanks to this testing there have also been fixes and changes made since rc4. Because of that, we like to present one more and hopefuly the last release candidate. With this common test ground, we would like to ask you for doing all kind of final testing. So please file bugs at http://bugs.skolelinux.org/now, if you see any problems. We are especially interested in reports about upgrades from the sarge based version of Debian-Edu. If you do not have hardware available to test on, please have a look at http://wiki.debian.org/DebianEdu/HowTo/TestCDinstall for hints about to test without.

Please help to make Debian-Edu/Skolelinux 3.0 the best release ever by testing this release candidate and providing feedback of any kind to: debian-edu@lists.debian.org

Highlights:

Enabling diskless workstations no longer break thin client boot.

Hotplug devices now work on diskless workstations.

No longer provide read/write access to the thin clients hard drive to the thin client user. New configuration variable LOCALDEV_FIXEDVISIBLE to enable the old behaviour. This configuration variable is not yet provided from upstream and might change name or behaviour in the future.

Minor cleanup in how PAM and NSS are configured for LDAP, reducing the amount of manual editing done by cfengine.

Changed partitioning rules to get more of the available disk space allocated as unused LVM space, and reduce the minimum disk requirements. Adjusted the minimum partition sizes based on recent installations.

Fixed bug in Samba LDAP integration to make it possible to add machines to the Domain.

lsb-releases returns the same values as on debian etch now, except for DISTRIB_DESCRIPTION, which returns "DebianEdu/Skolelinux (terra)". And, same as debian etch, debian-edu etch is lsb 3.1 compliant.

Replaced the logo used in the graphical installer with our own image.

Some features are still not working as they should. We are aware of these at the moment and would like help finding a fix for it:

The netinst installation from CD tend to have a timeout when downloading packages. The workaround is to restart package installation when this happen.

The amd64 netinst CD can not install LTSP, as it is missing the i386 binaries needed.

Test release candidate 4, 2007-07-08

This is the fourth release candidate of debian-edu etch. Even though it was planned to release the final version after rc3, it was decided to release (at least) one more release candidate. The reason for that is, that some critical bugs have been fixed and some new features and changes have been implemented. So please file bugs at http://bugs.skolelinux.org/now, if you see any problems. If you do not have hardware available to test on, please have a look at http://wiki.debian.org/DebianEdu/HowTo/TestCDinstallto learn about ways to test without hardware.

Even if we did not hold the promise to release within 1.5 weeks after rc3, we still plan to release soon.

Highlights

Fixed admin user access to LDAP.

Keep the /etc directory under version control (using debian-edu-etc-svk).

Fixed students kde start menu and put some more icons on the desktop.

Changed the sitesummary client code to make it less likely that all clients connect to the server at the same time, to spread the load on the server.

Changed sitesummary to only add clients with munin-node installed to the list of munin clients to check.

Includes another round of translation updates for kde 3.5.5 for Bokmål and Nynorsk

Added 700 MiB of desktop packages proposed by Linex.

Fixed propagation of the LDAP SSL certificate to the clients.

Added support for the LDM_DIRECTX LTSP setting to reduce security for higher performance.

Prevent storage devices like usb-sticks and medias like cds inserted into the terminal server from raising an popup window on KDE sessions of remote terminal server users.

Restrict jradmins to only be able to change passwords of users who are not members of the "admins" group.

Improved the ltsp-make-client script used to generate the LTSP environment for diskless workstations.

Made sure all the support programs used by gcompris are installed by default.

Some features are still not working as they should. We are aware of these at the moment and would like help finding a fix for it:

Scripts to clean up leftover ltsp swap files and processes from abnormal shutdowns of clients and server.

Fixed local device access in Standalone installs.

Fixed network-manager access for the initial user in Standalone installs.

Samba used scripts from wlus to update ldap when joining the domain. Fixed by including the script in our configuration package.

Made sure the client part of LTSP local device support (ltspfsd) is installed on the clients.

Changed the pam_group config to add all users loggin in to the fuse group, to try to get local device access working out of the box when enabled in LTSP.

Removed some obsolete code in the installer used on woody and sarge.

Munin on main-server will now monitor all hosts reporting to sitesummary automatically.

Removed unused code and obsolete comments from dhcpd.conf.

Modified code generating self-signed certificate for the LDAP server to make the public key available on the web, and added a boot script to download this key to all clients the first time they boot.

Fixed code to make admin users get a link to the web site with admin tools and information on their desktop.

Test release candidate 1, 2007-05-20

The Debian-Edu/Skolelinux project is pleased to announce that the next test release of "Debian-Edu/Skolelinux 3.0, codename 'terra'" is ready. This is the fifth test release based on Debian/Etch. It is available to download using FTP, HTTP and rsync.

This is the first release candidate of debian-edu etch. After that we will release RC2 and RC3 with shorter delays in between and then we will release. So please file bugs at http://bugs.skolelinux.org/now, if you see problems. Even if you dont have available hardware to test on, you can still help with testing in qemu. The url http://wiki.debian.org/DebianEdu/HowTo/TestCDinstall will help you get started.

test4 was one day late, so we shifted the release schedule: we now plan to release RC2 on May 27h, RC3 on June 3nd and Debian-Edu etch on June 10th. We might cut RC2 and RC3, as we want to release at the end of May.

Highlights

Firefox is now installed by default, with a few much used translations. Due to legal reasons firefox is called iceweasel in Debian.

The hostname is now correctly set based on DNS name.

This release reintroduces the CD. It will grab the packages that did not fit on the first cd from network.

debian-edu-doc is a new package containing all documentation. Currently it lacks update of the information for etch and translation. Help welcome!

Checks in place to avoid installing the standalone profile together with any of the others.

Test release 4, 2007-05-13

The Debian-Edu/Skolelinux project is pleased to announce that the next test release of "Debian-Edu/Skolelinux 3.0, codename 'terra'" is ready. This is the fourth test release based on Debian/Etch. It is available to download using FTP, HTTP and rsync.

This will be the last test-release of debian-edu etch. After that we will release RC1, RC2 and RC3 with shorter delays in between and then we will release. So please file bugs at http://bugs.skolelinux.org/now, if you see problems. Even if you dont have available hardware to test on, you can still help with testing in qemu. The url http://wiki.debian.org/DebianEdu/HowTo/TestCDinstall will help you get started.

We plan to release RC1 on May 19th, RC2 on May 26th, RC3 on June 2nd and Debian-Edu etch on June 9th. We might cut RC2 and RC3, as we want to release at the end of May.

Highlights

Fix handling of USB and other hotplug devices.

Framework for selecting languages during installation is now working again.

LTSP default keyboard layout now uses the one selected during installation.

LTSP network swap is enabled by default.

CPU frequency scaling is enabled on all machines supporting it. Will increase battery lifetime and reduce power bill.

Test release 3, 2007-04-21

The Debian-Edu/Skolelinux project is pleased to announce that the next test release of "Debian-Edu/Skolelinux 3.0, codename 'terra'" is ready. This is the third test release based on Debian/Etch. It is available to download using FTP, HTTP and rsync.

Highlights

Based on the recently released Debian 4.0 Etch.

Released as a DVD image, with a lot more translations and applications available.

Includes ltspfs for local device access from thin clients.

Improved laptop support.

And a lot more...

Test release 2, 2006-11-23

Highlights

Installer support encrypting disks and partitions

Added flash web plugin support using gnash

Added the adept graphical package manager

Added much used package ktuberling

Added sitesummary system to make it easier to keep track of a lot of machines in the network.

Fixed the NTP configuration.

ltsp 0.99debian8 (supports encrypted swap and on-demand network swap)

KDE upgraded from version 3.5.4 to 3.5.5

New artwork (boot splash and KDE)

Audio device access should work out of the box.

X.org upgraded from version 7.0 to 7.1.

Some new features which are not yet fully working, but the framework is already in place:

Kiosk mode

Some features are still not working as they should. We are aware of these at the moment:

No LDAP user admin tool yet

Hotplugging USB disks do not work

Dropped gcompris and gperiodic to save space.

Test release 1, 2006-09-24

After months of hard work, a new Skolelinux CD image is ready. This is the first test CD preparing for a debian/etch based release. It is available from FTP, HTTP and rsync. The image size is 695 MiB.

There are a lot of changes since the last CD release based on Sarge. Here are some highlights

Ported the installer to etch using d-i beta3

Linux kernel 2.6.17

KDE 3.5.4

New versions of educational software and improvements in the package choice

New debian-edu-expert mode with new profile and manual partitioning to enable a bare-bone system without any services, for single-service installs

Debian-Edu bootsplash during the boot process

Custom kdm and kde artwork

Some features are still not working as they should. We are aware of these at the moment:

LTSP server is not set up during installation. It can be set up manually after the installation.

LVM partitioning fail if an existing LVM partition is found on the hard drive. A workaround is to boot with boot param 'linux debian-edu-expert' to get the manuall partitioning. This will be fixed in the next version of debian-installer.